Accused white supremacist killer James Fields was pulled over by police during a routine traffic stop earlier this year in Ohio, and his demeanor couldn't have been more different to his alleged behavior on Saturday.

Dashcam footage released by state police shows the 20-year-old being completely cooperative and contrite after the same Dodge Challenger that plowed into counter-protesters in Charlottesville, was pulled over.

Audio on the dashcam video reveals how Fields was helpful to the police throughout their interaction even replying 'Yes, sir' to the officer when asked questions.

A Maumee cop pulled over James Alex Fields Jr. on May 25, 2017. He was ticketed for expired or unlawful plates and was fined $150

Alleged driver, James Alex Fields was pictured in a mugshot released after his arrest by law enforcement

During the traffic stop, police noticed he had expired tags and was also driving without proof of insurance, but the officer let him off with just a warning and was fined $150.

On Monday, Fields made his first appearance in court where he was denied bail after being charged with ramming his car into a crowd in Charlottesville - murdering one and injuring dozens more.

The man from Maumee, Ohio, appeared in court by video monitor from the Albemarle Charlottesville regional jail.

The judge charged him with one count of murder, for the death of Heather Heyer, 32, and three counts of malicious wounding, as well as one charge of hit and run.

When he was asked by Judge Robert Downer if everything he said was truthful he raised his right hand and said: 'Yes, sir.'

He is accused of being at the wheel of the Dodge Challenger which was driven at speed into a crowd of counter-demonstrators who had gathered in response to a far-right rally whose organizers said they were protesting the removal of a Confederate memorial in the city.

'He used this car as a weapon,' Maumee Police Lt. David Tullis said. 'Any time somebody has so much hatred in them that they're going to drive into a group of innocent people that do not expect to be run into for just protesting what they believe — when hate overcomes that and they want to hurt from the hatred, then there's a problem.'

Hand raised: On Monday alleged car murderer James Fields, 20, raised his hand and said 'yes, sir' when Judge Robert Downer asked him if everything he said was truthful

During his appearance in court, Field spoke in short yes and no statements during the appearance. He quietly responded 'no, sir' when asked by the judge if he could afford an attorney.

He was denied bail, and his next appearance was scheduled for August 25.

The murder of Heather Heyer sent shockwaves around the country and was captured in graphic video footage.

The film shows the Dodge Challenger careering into protesters before reversing fast down the street.

Witnesses have described the terrifying moment a car accelerated towards and plowed into a crowd of people protesting at a white nationalist rally.

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Seen before attack: James Fields was captured behind other members of the 'United the Right' rally in Charlottseville, VA, on Saturday, before he allegedly murdered a counter-protester with his car

Screams rang out as the Dodge Challenger sped into demonstrators, throwing bodies into the air, before reversing at high speed.

Witness Nic McCarthy told C-VILLE Weekly: 'There was someone in a dark vehicle that sped, very quickly, down this road and rammed into the crowd.

'People... He backed up and he went back in again.'

Fields was fascinated with Nazism, idolized Adolf Hitler, and had been singled out by school officials in the 9th grade for his 'deeply held, radical' convictions on race, a former high school teacher said Sunday.

Fields also confided that he had been diagnosed with schizophrenia when he was younger and had been prescribed an anti-psychotic medication, Derek Weimer said in an interview with The Associated Press.

In high school, Fields was an 'average' student, but with a keen interest in military history, Hitler, and Nazi Germany, said Weimer, who said he was Fields' social studies teacher at Randall K. Cooper high school in Union, Kentucky, in Fields' junior and senior years.

Accelerating: Terrified protesters tried to flee the path of the vehicle as it sped towards them

'Once you talked to James for a while, you would start to see that sympathy toward Nazism, that idolization of Hitler, that belief in white supremacy,' Weimer said. 'It would start to creep out.'

As a senior, Fields wanted to join the army, and Weimer, a former officer in the Ohio National Guard, guided him through the process of applying, he said, believing that the military would expose Fields to people of different races and backgrounds and help him dispel his white supremacist views.

But Fields was ultimately turned down, which was a big blow, Weimer said. Weimer said he lost contact with Fields after he graduated and was surprised to hear reports that Fields had enlisted in the army.

Heather Heyer, 32, was killed when she was hit by the car as she demonstrated against a neo-Nazi rally in Charlottesville

The horrifying scenes in Virginia came after violent clashes erupted between white nationalists and activists.

Upsetting video footage of the vehicle ramming into the crowd, described by some as a terror attack, was uploaded online moments after the fatal collision.

People can be heard crying and shouting in the aftermath of the smash.

There were several hundred protesters marching when the car drove into a group of them and police said the crash happened near the intersection of Fourth and Water streets.

Fleeing: The vehicle reversed at high speed after eing driven into the crowd, and witnesses say it ran back over pedestrians

Backing up: One witness said:' There was a girl that was caught and she was trying to get up and it ran over her again'